Hydraulic swivel.



WWQOQ@ ff Maf/Mam@ L. J. BLACK.

HYDRAULIC SWIVEL.

APPLIOATION rum Dnc. s. '1913.

1,119,774. Patented Dec. 1,1914

LEE J. BLACK, OF BEAUMONT, TEXAS.

HYDRAULIC SWIVEL.

Specification of Letters Patent.

Application filed December 5. 1913. Serial No. 804.955.

To all whom v't may concern.

Be it known that 1, Lan J. BLACK, a. citizen of the United States. residing at Beau- 'mont, in the county of Jeli'erson and State of Texas, have invented certain new and useful Improvements in l'lydraulic Swivels, of which the following is a specification.

This invention relates to devices known as hydraulic. swivels which are designed for use in connection with rotary well-drilling machines, to permit the flow of water to the point of the drill.

it is the object of the present invention to provide a novel and improved structure which permits perfect lubrication of the movable parts of' the. device, and also prevents access of grit, uuid and other foreign substances to said parts.

rlhis object is attained by means of a combination and arrangement of parts to be hereinafter described and claimed, reference heilig had to the accompanying drawing in which a central vertical section of the device is shown.

Referring specifically to the drawing, denotes the usual tubular swivel stem which is screw-threaded at its lower end. as in' dicated at (i. for connection to the rotary drill-tube or casing. Through this stem loosely extends the wash-pipe 7 having connected to its upper end the goose-neck 8 carrying ya suitable coupling 9 for connection to the supply-hose.

The lower end of the swivel stem 5 is formed with a stuiling box 10, closed by a gland 11, which latter is screwed into the stufling box. A pair of spaced junk rings 12 confine a. packing 13 in the stulling box. Thus, a liquid-tight joint is ina'de between the lower end of the wash-pipe 7 and the corresponding end of the swivel stem.

The upper .end of the swivel 'stem 5 has a stalling box 14 containing a bottom pink ring 15, a gland 16 and a packingr 17 therebetween. (ln the upper end of the swivel stem is screwed a bonnet 18 having an internal shoulder 19 which engages the gland 16 and holds the same in place. The washipe 7 passes throu h the bonnet, and the iiatter has a stuffing x 2O at its upper ond which is provided with a gland-21.. Qn that portion of the wash-pipe which is 1n the stun box 20 is made fast a' collar 22, and agevo and below this collar are 23 between each sot of which are located antifriction balls 24. On the upper end of the stuiling box Q0 is screwed a cap 25 to hold the gland 21 in place, and between l.said gland and the top race-ring is a packmg 2G.

To the swivel stein 5, intermediate the ends thereof. is applied a cross-head 27 having dialnetrically opposite trunnions 28 for connection of the bail 29, the latter being held ou the trunnions by washers 30 and screws 31. The bottom of the cross-head has a sluiling box 32 through which the swivel stem passes, said stuling box con taining' a packing 33 and a gland 34 held in place by u. cap 35.

'lo thc swivel stem 5, below the stuiiing box 32, is secured, by countcrsunk set screws 3G, a set collar or abutment 37 having a top sleeve-extension 38 which abats against the bottom of the cross-head 27, aud surrounds the stuliing box 32.

To the top of the crosshead 27, is screwed .or otherwise fastened a housing 89 which rises from the cross-head and has a reduced upper cud through which the swivel stem :'i passes. The upper end of the housing also carries a stuihng box 40 surrounding the swivel stern, and provided with a packing 41, a gland 42 and a cap 43. The housing 39 incloses a bearing collar 44: which is screwed or otherwise made fast to the swivel stein ,5. The bearing collar is spaced from the top of the cross-head `27 a sufficient distance to accommodatea pair of race-rings encircling the swivel stem. Two concentric annular series of antit'riction balls 4G are interposed between the racc-rings, the same being provided with a spacing ring,r 47. The cross-head 27 is held against longitudinal movement on the swivel stem 5 by the collars 37 and 44, a ball bearing as shown and described being interposed between the collar 44 and the top of the cross-head.

The. purpose of the stufiing boxes 32 and 10, and the housing 39, is to form an oiltight compartment in which the rotating parts run, thereby rendering possible perfect lubrication of said parts, and also excluding therefrom dust, dirt, grit and other foreign substances, which is important in order to prevent undue wear and friction. Theoil is'lfree to circulate around the racerings 45 and the balls 46 therebetween, and also along the outside of the swivel stem 5 and down through the cross-head 27, which latter is stationary. The' sleeve-ex- Patented Dec. 1, 1914.

the up tension 38 is designed to protect the stuifing box 32, and also to hold the cross-head firmly against its top bearing composed of the collar 44 and the ball bearing between the latter and the top of the cross-head, the collar being fast on the swivel stem and suiportiug the entire load.

claim:

l. In a hydraulic swivel, the combination of a swivel stem, a cross-head through which the swivel stem passes, a stuffing box on the bottom of the cross-head and surrounding the swivel stem, and abutment on the swivel stem below the stuffing box, said abutment having a sleeve extension surrounding the stufling box and abutting against the bottom of the cross-head.

In a hydraulic swivel, the combination of a swivel stem, a cross-head through which the swivel stem passes, a stufiinglbox on the bottom of thecross-head and surroundin the swivel stem, and a housin carried by t e swivel stem below the crossead, said housing surrounding the stuing box.

3. In a hydraulic swivel, the combination of a swivel stem, a cross-head through which the swivel stem passes, a top bearin for the cross-head carried by the swve stem, a housing connected to and rising from the top of the cross-head and surrounding the to bearing, stuiiing boxes on er end o the housing and on the bottom o the cross-head, through which stuifing boxes the swivel stem passes, and a 04pm of this patent may be obtained for housing carried the cross-head, said housing surrounding the stufiing box on the bottom of the crosshead.

4. In a hydraulic of a swivel stem, which the swivel stem passes, a to bearin for the cross-head carried by t e swive stem, a housing connected to and rising from the top of the cross-head and surrounding the. to bearing, stuiiing boxes on the up er end o the housing and on the bottom o the cross-head, through which stuifing boxes the swivel stem passes, and an abutment on the swivel stem below the second-mentioned stuing box, said abutment having a sleeve extension surrounding said stuffing box and abutting against the bottom o the cross-head.

5. In a hydraulic swivel, the combination of a swivel stem, a cross-head through which theswivel stem passes, a top bearing for the cross-head adjustably mounted on the swivel stem, a housin connected to and rising from the top of t e cross-head and surrounding the top bearing, and a stuifing box on the upper end of the housing through which the swivel stem asses.

In testimony whereof I my signature in presence of two witnesses.

LEE J. BLACK.

swivel, the combination Witnesses:

G. TIM WILL, W. G. ALLEN.

ava cent each, by addressing the Commissioner of Patents,

Washington, D. C.

by the swivel stem below :.I.'

a cross-head through 

